Key-seat-milling machine



(No Model.)

3 Sheets-Sheet 1. A. H. CAMPBELL.

KEY SEAT MILLING MACHINE.

Patented Apr.3,1883.

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. ATTYs (No Model.) 3 Sheets-Sheet 2.

A. H. CAMPBELL.

v KEY SEAT MILLING MACHINE. No. 274,906. Patent ed'Apr.3, 1883.

FIG.5.

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(No Model.)

3 Shets-Sheet 3 A. H. CAMPBELL, KEY SEAT MILLING MACHINE.

Patented Apr. 3, 1883.

FIGJOJ.

FIGS.

INVENTOR.

WITNESSES UNITED STATES PATENT OFFICE.

KEY-SEAT-MILLiNG MACHINE.

sPEcIrrcATIoN forming art of Letters Patent No. 274,906, dated April 3, 1883.

Application filed December 1, 1882. (X model.)

To all whom it may concern:

Be it known that ALEXANDER HAMILTON CAMPBELL, of Waynesborough, county of Franklin, and State of Penusylvania,have inventednew and useful Improvements in Key- Seat-MillingMachines; andldoherebydeclare that the following is a full and exact description of the same, reference beinghad to the accompanying drawings, and to the letters of. reference marked thereon.

This invention is specially adapted for outting a key seat'or groove in the axle of a locomotive when the same is in position under the a engine, this groove being designed for holding 1 the key of the eccentric, the position of which latter cannot be determined until the axle is in place.

In the drawings, Figure 1 represents an end elevation of my improved machine; Fig-2,a side elevation of the shifting'lever and its attachments, by means of which the feed-screw G is either thrown out of gear or caused to 'revolve in either direction Fig. 3, a partial view of the tightening-pieces detached; Fig. 4, a plan view of one of the clamping-bands detached; Fig. 5, a front elevation of the machine Figs. 6, 7, and 8, various views of the cross-head detached, and Figs. 9and front and side elevations of the gear-wheel G To enable others skilled in the art to make myimproved machine and properly use the same, I will proceed to describe fully its construction and manner of operation. I

A represents a metal frame, having vertical standards a a at each each end, and a horizontal beam, at, uniting the standards together, as shown.

' c a represent semicircular feet upon the standards, adapted to rest upon an axle or shaft, a which are provided with horizontal flanges a a and with a central longitudinal recess, as shown.

a 0. represent semicircular bands, having horizontal flanges a a? and a central longitudinal recess, as shown.

a a represent semicircular pieces or strips having roughened or serrated faces, which are adapted'to lie in the recesses of the feet and clamping-bands,as shown in Fig. l. The in- 50 ner faces of these pieces coincide with the outer faces of the article to be grasped.

c n represent bolts adapted to extend through the horizontal flanges a a for the purpose of clamping the frame securely to the axle or shaft. a c represent brackets extending from the frame Ain lateral direction in such manner as to furnish proper bearings" for the inclined driving-shaft B, as shown. l

1 represents a hand-wheel located on the lower end of the shaft B, and b a bevel-gear on the upper end of the same. a a" a" represent vertical extensions of the frame at each end of the machine, which serve to furnish proper bearings for the longitudinal shaft 6.

0 represents agear-wheel on one end of the shaft, which is adapted to engage with the geaewheel b, as shown, and c a gear-wheel,-

hereinafter referred to, upon the other end of 79 I the shaft. If it is designed to run the machine by power, the shaft B is dispensed with, and a pulley is subs! ituted for the gear-wheelc upon the shaft. 0. r

a. a represent ways with inclined bearing faces uponthe horizontal portion of theframe A, and D a cross-head having projections d, with inclined bearing-faces, adapted to engage with the ways of theframe, as shown.

d, d d represent extensions upon one side 30 of the cross-head, which furnish proper bear.- ings for the milling shaft or spindle E and its feeding-screw, as shown.

d represents an extension upon the opposite side of the cross-head, which is provided 8 5 with a threaded opening to receive the feed screw g, as shown. l 1

d also represents an extension upon the same side of the cross-head as (F, which is provided at its outer end with a semicircular 9o recess adapted to inclose partially the hub 0 of the shifting-wheel 0 upon the shaft 0, hereinafter referred to. l

6 represents a screw having the hand-wheel e, by means of which the milling-shaft may be adjusted in a vertical direction when desired.

0 represents a gear-wheel, which, by meansof a key engaging with a longitudinal groove in the shaft 0, is secured to the latter in such I 0 manner as to revolve rigidly therewith without interference with its freedom of movement in a longitudinal direction.

0 represents a hub of the wheel,having collars c c, by means of which connection is -made with the extension 01 of the cross-head I the wheel upon the shaft 0, as shown.

f represents a gear-wheel upon the other end of this shaft,-which is adapted to engage with the horizontal wheel 0 upon the milling-shaft E, as shown.

G represents a feed-screw extending through the extension (1 of the cross-head D, which feed-screw is supported by proper bearings in the vertical standard, as shown, and is provided at one end with the gear-wheel g, as shown.

H, Fig. '2, represents a lever pivoted upon the-main shaftO between the gear-wheel c and the extension at of the vertical standard, which is provided with proper bearings for supporting the gear-wheels h h, as shown, each of which is adapted to engage with the wheel g of shaft G when the lever is properly adjusted for that purpose.

h represents a springpin, which, in connection with any proper supporting device, is adapted to lock the lever in any position in which it may be adjusted.

The operation is substantially as follows: The machine having been strongly secured to the axle or shaft to be operated upon at the proper point by means of the semicircular feet, clamping-bands, tightening-strips, and bolts, the cross-head is adjusted upon the horizontal ways of the frame in such a manner as to bring the milling spindle or shaftE into its proper position relatively to the axle. The change gear lever H then being adjusted so that neither of its gear-wheels h h is in contact with the gear-wheel g of the horizontal feedscrew G, the tool of the milling-shaft may be caused to drill a holein the axle when the machineis in operation by simply revolving the one of its gear-wheels, h or 'h, is in contact with the gear-wheel y, then the movement of the main shaft will be communicated not only to the milling-spindle, but also to the horizontal feed-screw shaft, and consequently the cross-head is moved laterally across the machine'for the purpose of milling the work in the manner well understood.

It will be understood, of course, that when the gear-wheel h is in contact with the wheel gthe cross-head D is caused to travel in one direction, and thatwheu the gear-wheel h is in contact with the same the cross-head is caused to travel in the opposite direction.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In combination with the semicircular saddle a a the clamping-bands a a having the central longitudinal recesses, the bolts a a and the tightening-strips a (L as described.

. 2. In combination with the frame A, having devices, substantially as described,for clam ping the same to an axle or shaft, the crosshead D, with mechanism, substantially as described, for moving it upon the frame.

3. In combination with the frame A, havin g devices, substantially as described, for

clamping the same to an axle or shaft, the

cross-head, and screw, as described.

4. In combination with the saddle and clampin g-bands, having recesses, as described, the tightening-pieces, as set forth.

5. In combination with spindle mechanism, substantially as described, having clamping device, as set forth, a milling-tool, substantially as described, and mechanism for running the same to and over the work.

This specification signed and witnessed this 23d day of November, 1882.

A. H. CAMPBELL.

Witnesses:

D.'M. G001), Jr., 0. E. BESORE, GEo. W. WELSH. 

